Gage.



' H HESS.

GAG APPLICATION FI LE .13. I912.

1,159,025. 7 v Patentei-NOVQZ, 1915.

wi/lmeooeo 5140c whoa v Hw m I 41/5- r 93 Mai man s HENRY HESS, OFPHILADELPHIA, PENNSYLVANIA.

Specifieationot Letters Patent.

GAGE.

atented Nov. 2, 1915.

Application filed OctoberlS, 1912. Serial No. 726,413.

To all whom it may concern:

. Be it known that I, HENRY Hess, a citizen of the United States,residing at Philadelhia, in the county of Philadelphia and tate ofPennsylvania, have invented certain new and useful Improvements inGages, of which the. following is a specification, reference being hadtherein to the accompanying drawing.

y invention relates to gages, and more particularly to that class ofgage which may e designated a fixed dimension gage, for example forgaging height, diameters of bores and the like. By a fixed dimensiongage I mean one wherein there is no adjustment, the gage on the contrarybeing permanently designed or set for afixed size or dimension 'to whichthe object' being gaged must accord in the use of the instrument.

It is an object of the present invention to aflord gages of the typeshereinafter re-' ferred to, whereinare comprised. preformed sphericalhardened steel balls, and such gages may be provided incomplete setsofsiZes varying from each other by convenient gradations; I have alreadyin prior applications pointed out the great advantages ertaining to theuse of preformed spheres or afi'ording contacts of gages. For example,the sphere maintains correctness of shape in a higher degree and is lessliable to distortion than other shapes. A. steel sphere may besuperlatively hardened as Y The preformed spheres may be made at lessWell as made of most accurate shape- It is less subject to superficialdamage and to change of shape due to violent treatment.

expense than the other hardened steel shapes, so that an entire systemof gages might be constructed at less cost than a single micrometefigageadapted to the same objects.

Anot er object" and advantage hereof is to afford, as. the presentinvention 'does afford, a gage adapted not only to be used as a standardof. reference for standardizing other gages, but also. for direct use byl a workman in the shop.; Possibility of error is avoided when theproper gage has been selected for a given work, since no "change ofadjustment is possible, and there is little wear from, moving parts. Y

I will nowdescribe several instances or embodiments of the presentinvention, and will then point out the novel, features in the claims.

- the contact surfaces.

. parallel thereto, tangent to the opposite c onc In the accompanyingdrawings, Figure 1 shows in side elevation a height gage embore andheight gage shown in Fig. 3. Fig.

5 isa centralcross-section of the combined bore and height gage inproper position for gaging heights.

imilar letters of reference designate cor- '70 responding parts in theseveral figures of the drawings.

' The height gage A, Fig. 1, consists of a preformed sphere constitutedpreferably of q hardened steel, whereona flattened side has beenproduced at B by grinding, machining or otherwise. 1 By standing thegage upon its flat side B, it serves as a height gage for determiningthe height or dimension between the plane of the fiat side B and theplane or surface C, against which touches the opposite contact point ofthe sphere. Whatever may be the distance or dimension between the planesB and G will be the dimension of the height gage, andthis dimension willbe. etched or otherwise marked A upon the flat side B. This etching isnot shown in Fig. 1 but is indicated in Figs. 3 and i. T

In the'modification of Fig. 2-is shown, as 9 in Fig. '1, a flat sidedspherical height gage. V The sphere D in this case is not' necessarilyfiattened, but haspermanently attached or soldered to it a cylindricalor other shaped base E .whose underside F forms one of The dimension ofthis height gage will be the distance between the I plane of, the flatside F and the plane G tact point ofthe sphere. 1

The. modification shownin Figs. 3, 4 and 5 is adaptedto measuring bores.This gage consists of a preformed hardened steel; sphere H having amanipulating means not rigidly secured to the sphere butpreferably offlexible nature such as chain I, to which handle piece J may beattached- The dimension of this gage may be .90 inch and marked upon thehandle J. Assuming a bore is to be. gaged having a diameter or'dimension bounded by the vertical planes cause the sphere can follow thechanges/in the shape of the surfaces since they measure successivedimensions, whereas an ordinary gage is able only to measure minimum ormaximum dimensions owing to its substantial length and surface ofcontact. ,lhe

chainll serves not only as an eilici'ent means of removing the gage fromthe bore, but is compact, thus saving'space and weight, and is alsocapable of being deflected to one side so as not to interfere with theoperation of gaging heights as now to be described.

The gageshown in Figs. 3, l and 5 is also adapted to be employed as aheight gage analogously to the gage of Figs. 1 and 2. Moreover insteadofa single flattened side or surface, I am able by this invention toprovide a gage with a plurality of flattened sides which do not conflictbut coiiperate to render the gage adaptable to several di tinctdimensions. The several flattened areas are, however, confined wellwithin a hemisphere or half of the surface, so that when the gage isused as a bore gage as in Fig. 1, the horizontal equator will beuninterrupted. Y

A flattened surface L may be of such size as to afiord a dimension of.65 inch when employed in the manner indicated in 1 or 5 for measuringheights. This flattened su'rfabe will be practically circular and mayhave the dimension marked upon it as indi cated. A similarifi'atten'edsurface at M may afford a dimension of .70 inch fora height gage. Athird flattened surface N may afford a dimension of .75 inch, and afourth fiattened'surface may afiord a dimension of .80 inch". The use ofthis instrument as a height age is indicated in Fig. 5, where thesurrace' is employed as a base and the opposit/s contact point of thesphere tangentially touches the plane Q, the distance be "tween L and Q.being .65, the dimension of the gage. Between the several flattenedsurfaces L, M, N, U, or otherwise-suitably located, may be an attachingpoint P for the flexible attachment or chain 1'; for example the portionP may be concave and the chain may be secured to the sphere therein bymeans of a pin R indicated in icense The gages thus described will beseen to possess the advantages and attain the obj hereinabove recited,and other. advantages with or without other features or detail do notwish to be limited to the specific constructions except as set forth 1nthe appended claims. v

What I claim and desire to secure by ters Patent is: P

l. A, fixed-dimension gage for effecting scientifically. accuratemeasurements, the same comprising a preformed sphere having a pluralityof diii'erent sized flat surfaces produced thereon, each opposed by aportion of the sages spherical surface; whereby are afforded a pluralityof gage dimensions for measuring heights.

2. combined height and bore age comprising a sphere having a fiexib eattach merit Ior entering it into and removing it from a bore, and aplurality of difierent sizedfiattened surfaces adjacent said flexibleattachment for adording a plurality of dimensions for gaging heights.

3. A combined height and bore age conr prising a sphere having a'fiexiheattachment for entering it into and removinr it fromabore, and saidsphere having a nettened surface serving spherical contact point, saidflattened side formed to leave the spheres equator uninterrupted forgaging bores, and said flexible attachment being connected to the spherethe same side of the uninterrupted gaging equator as said flattenedbase.

as a base for gaging heights by. coiiperation with the opposite 4. Acombined height and bore gage comprising a sphere havin a manipulatingat- I tachment for'entering 1t into and removing 1 'itfrom a bore, andsaid sphere having a fiattened surface serving as ,a base for gagingheights by coiiperation with they opposite spherical contact point, saidflattened side formedfto leave'thejspheres equator unin terfu ptedzfor'gaging bores, and said attachment' being connected to the spherepermanently in such manner} as not to interfere either with the heightgaging or bore'gaging operations of] theinstrument.

Inltestimony whereof Ififiii my signature in 'presenceof two witnesses.

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